extract() — spring-boot Function Reference

Architecture documentation for the extract() function in OnBeanCondition.java from the spring-boot codebase.

Function java GradlePlugin AotProcessing calls 1 called by 2

Entity Profile

GradlePlugin→ AotProcessing→ extract() — spring-boot Function Reference

Dependency Diagram

graph TD
  b215a045_003d_ca5f_f7f1_607aa7b55546["extract()"]
  14ef4e99_fc3b_79df_b329_a8d884951727["Spec()"]
  14ef4e99_fc3b_79df_b329_a8d884951727 -->|calls| b215a045_003d_ca5f_f7f1_607aa7b55546
  5f7f6b86_e4e1_3c58_a600_2409c3234a60["extractTypes()"]
  5f7f6b86_e4e1_3c58_a600_2409c3234a60 -->|calls| b215a045_003d_ca5f_f7f1_607aa7b55546
  f70893ce_a7b9_f558_f105_c937e4d13cf1["merge()"]
  b215a045_003d_ca5f_f7f1_607aa7b55546 -->|calls| f70893ce_a7b9_f558_f105_c937e4d13cf1
  style b215a045_003d_ca5f_f7f1_607aa7b55546 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

core/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/condition/OnBeanCondition.java lines 610–628

		private Set<String> extract(@Nullable MultiValueMap<String, @Nullable Object> attributes,
				String... attributeNames) {
			if (CollectionUtils.isEmpty(attributes)) {
				return Collections.emptySet();
			}
			Set<String> result = new LinkedHashSet<>();
			for (String attributeName : attributeNames) {
				List<@Nullable Object> values = attributes.getOrDefault(attributeName, Collections.emptyList());
				for (Object value : values) {
					if (value instanceof String[] stringArray) {
						merge(result, stringArray);
					}
					else if (value instanceof String string) {
						merge(result, string);
					}
				}
			}
			return result.isEmpty() ? Collections.emptySet() : result;
		}